Phase diagram of nuclear 'pasta' and its uncertainties in supernova cores

Journal Article · Sat Mar 15 04:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.035806· OSTI ID:21189872

Sonoda, Hidetaka ^[1]; Watanabe, Gentaro ^[2]; Sato, Katsuhiko ^[1]; Yasuoka, Kenji ^[3]; Ebisuzaki, Toshikazu ^[2]

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1. Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)
2. Institute of Chemical and Physical Research (RIKEN), Saitama 351-0198 (Japan)
3. Department of Mechanical Engineering, Keio University, Yokohama 223-8522 (Japan)

We examine the model dependence of the phase diagram of inhomogeneous nulcear matter in supernova cores using the quantum molecular dynamics (QMD). Inhomogeneous matter includes crystallized matter with nonspherical nuclei--''pasta'' phases--and the liquid-gas phase-separating nuclear matter. Major differences between the phase diagrams of the QMD models can be explained by the energy of pure neutron matter at low densities and the saturation density of asymmetric nuclear matter. We show the density dependence of the symmetry energy is also useful to understand uncertainties of the phase diagram. We point out that, for typical nuclear models, the mass fraction of the pasta phases in the later stage of the collapsing cores is higher than 10-20%.

• OSTI ID: 21189872
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
DENSITY
MASS
MOLECULAR DYNAMICS METHOD
NUCLEAR MATTER
NUCLEAR MODELS
NUCLEI
PHASE DIAGRAMS
SATURATION
SUPERNOVAE
SYMMETRY